Happy birthday, Michelle Obama: The first lady turns 49

January 17, 2013 |SFGate.com

Lefteris Pitarakis/Associated Press

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U.S. first lady Michelle Obama plays with schoolchildren during a 'Let's Move!' event for about 1,000 American military children and American and British students at the U.S. ambassador's residence in London, ahead of the 2012 Summer Olympics, Friday, July 27, 2012.

U.S. first lady Michelle Obama plays with schoolchildren during a 'Let's Move!' event for about 1,000 American military children and American and British students at the U.S. ambassador's residence in London, ahead of the 2012 Summer Olympics, Friday, July 27, 2012.